3G Alternator Belt Squeal

[mcb82gt]

Ranger/Explorer heater control valve. Part number 74809. Apply vacuum to bypass heater core.

Any pics of this install? Or more details? Thank you.

[sly]

Any pics of this install? Or more details? Thank you.

Lines in on one side... lines out on the other (put it in-line with the heater hoses). Then run a vacuum line to the source you want to use (panel vents only source for automatic usage - pneumatic switch for manual usage). Routing is dependent on vehicle and desired usage. That's about it. You will need to swap the heater hose lines on one end of the valve as one line crossed over the middle of the valve.